I don't get one point.
Why completely remove the limit, and not just raise it to 160 and see what will happen ? (as it was down in 2014)
from 80 limit to unlimited... there is a clear difference (it is really an extremist vision).
Surprising and unexpected usage will for sure appear.
Interesting view :

BeInCrypto
OP_RETURN Limit Debate: Peter Todd’s Proposal Stirs Tensions
Peter Todd's OP_RETURN size limit proposal sparks controversy, dividing Bitcoin Core developers and the community.